39 lines
725 B
Plaintext
39 lines
725 B
Plaintext
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[gd_resource type="Shader" format=3 uid="uid://c84r6o3a8gfo0"]
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[resource]
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code = "shader_type canvas_item;
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render_mode blend_premul_alpha;
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uniform vec4 color;
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uniform vec2 origin;
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uniform vec2 delta;
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uniform float width;
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uniform bool enable_aa;
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float get_sdf(vec2 pos) {
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if (delta == vec2(0.0)) return float(-1.0);
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float h = clamp(dot(pos, delta) / dot(delta, delta), 0.0, 1.0);
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return length(pos - h * delta);
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}
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vec4 sdf_to_color(float sdf) {
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if (enable_aa)
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return vec4(color.rgb, mix(
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0.0,
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color.a,
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(width * 0.5 - sdf) * 2.0
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));
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else
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return vec4(color.rgb, 1.0 - floor(sdf / (width * 0.5)));
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}
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void fragment() {
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COLOR = sdf_to_color(get_sdf(
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floor(UV / TEXTURE_PIXEL_SIZE) - origin
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));
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}
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"
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